Hi there!
I'm Edward from Ecwid Team.
I'm really sorry for a delayed reply. Please let me address your question.
There are no built-in tools to add a description to the products in the grid view, I'm afraid.
However, Ecwid, in some sense, is an open-source platform. We have a free and open API available for all of our merchants on paid plans —
https://developers.ecwid.com/api-documentation This API allows creating custom solutions and features specifically for your store.
So with the help of custom development, it's possible to edit the layout of your store in the grid view and add the product description.
If you need assistance with some custom features you want to see in your store, our Customization Team will be happy to help you for an extra fee.
If you are interested, please let me know. I'll forward your request to our Customization team. Also, you can fill out this form
https://ecwidcom.typeform.com/to/vIlijv and they will get back to you with the details.